mobile/java/MobileUi.java

/** Browser gestures use the same interface coordinates and bounds as the client renderer. */
final class MobileUi {
    static boolean scroll(RSInterface widget,int originX,int originY,int x,int y,int delta,int depth){
        if(widget==null||depth>12||widget.type!=0||widget.aBoolean266
            ||x<originX||y<originY||x>=originX+widget.width||y>=originY+widget.height)return false;
        if(widget.children!=null&&widget.childX!=null&&widget.childY!=null){
            for(int i=Math.min(widget.children.length,Math.min(widget.childX.length,widget.childY.length))-1;i>=0;i--){
                int id=widget.children[i];
                if(id<0||id>=RSInterface.interfaceCache.length)continue;
                RSInterface child=RSInterface.interfaceCache[id];if(child==null)continue;
                int childX=originX+widget.childX[i]+child.anInt263;
                int childY=originY+widget.childY[i]+child.anInt265-widget.scrollPosition;
                if(scroll(child,childX,childY,x,y,delta,depth+1))return true;
            }
        }
        if(widget.scrollMax<=widget.height)return false;
        widget.scrollPosition=Math.max(0,Math.min(widget.scrollMax-widget.height,widget.scrollPosition+delta));
        return true;
    }
}